Who discovered that cathode rays are made up of electrons?

Question

Who discovered that cathode rays are made up of electrons? (A) William Crookes (B) G.J. Stoney (C) R. A. Millikan (D) J. J. Thomson

Tardigrade Admin · Accepted Answer

J.J. Thomson discovered that cathode rays are made up of electrons.

Q. Who discovered that cathode rays are made up of electrons?